EIF3L encodes a subunit of the eukaryotic translation initiation factor 3 (eIF3) complex, which plays essential roles in protein translation initiation and regulation. As part of the eIF3 complex, EIF3L functions in translational initiation and formation of cytoplasmic translation initiation complexes 1. The protein exhibits α-helical structure and behaves as a monomer when not interacting with molecular partners, but can interact with other eIF3 subunits like eIF3k 1. EIF3L demonstrates significant disease relevance through viral interactions, particularly with flavivirus NS5 proteins, where it may modulate yellow fever virus replication 2. The protein also interacts with porcine epidemic diarrhea virus M protein, functioning as a negative regulator of viral replication 3. In cancer contexts, EIF3L shows clinical significance as its expression patterns correlate with glioblastoma multiforme prognosis and alternative splicing events 4. Additionally, EIF3L undergoes androgen-induced palmitoylation in prostate cancer cells, suggesting potential as a diagnostic biomarker 5. The protein participates in stress response mechanisms, working with other factors to regulate ATF4 translation and proteostasis 6, and functions as part of a ribosome content regulation system 7.